Composite substrate for acoustic wave device



FIG. 1 is a front view of a composite substrate for acoustic wave device showing our new design;

FIG. 2 is a back view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right view thereof; a left view thereof being a right-and-left-reversed image; and,

FIG. 6 is an enlarged cross-sectional view taken along line 6-6 in FIG. 1.

The broken lines in the Drawings depict portions of the composite substrate for acoustic wave device that form no part of the claimed design. 

CLAIM The ornamental design for a composite substrate for acoustic wave device, as shown and described. 